function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Arillo, Antonio & Peñalver, Enrique & García-Gimeno, Victoria', 2],
    ['Chillcott, James G.', 1],
    ['Dale E. Greenwalt & Daniel J. Bickel & Peter H. Kerr', 1],
    ['Elgueta, Mario & Santos, Charles Morphy D.', 1],
    ['Grimaldi, David A.', 2],
    ['Imada, Yume & Kato, Makoto', 12],
    ['Kerr, Peter H.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);